The record-keeping organization said it did not have a previous entry for the record, so officials determined the girl would have to find 25 of the clovers to set a new record -- something she accomplished in the first seven minutes of searching in her family's Spotsylvania County back yard.
The girl said she had to throw out several clovers found to have five, six, seven, eight and nine leaves, leaving her with a total 166 clovers by the end of the hour.
"She's never done it for more than five or 10 minutes at a time, so we didn't know what she would get," Sara Borka told The Free Lance-Star newspaper. "But she really does find them everywhere."
The parents said they have submitted the required evidence to Guinness to get Katie's official certification as a record-holder.
The record attempt has made Katie a popular local figure, with even the Spotsylvania County Government offering its congratulations in a Facebook post.
Correction: An earlier version of this story misidentified Katie Borka's home state.
